Observational studyCMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne2014
Pregnancy and the risk of a traffic crash.
Observational study in CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 2 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
16 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Control yourself: ISPE-endorsed guidance in the application of self-controlled study designs in pharmacoepidemiology.Pharmacoepidemiology and drug safety · 2021Pooled it
- Maternal trauma due to motor vehicle crashes and pregnancy outcomes: a systematic review and meta-analysis.BMJ open · 2020Pooled it
- Maternal safety of the delayed-release doxylamine and pyridoxine combination for nausea and vomiting of pregnancy; a randomized placebo controlled trial.BMC pregnancy and childbirth · 2015Trial
- Motor Vehicle Driving During Pregnancy Does Not Influence Uterine Contractions.Obstetrics and gynecology international · 2025Article
- Analysis of desert traffic accidents: A retrospective study.Qatar medical journal · 2024Article
- Motor Vehicle Crash Risk among Adults Undergoing General Surgery: A Retrospective Case-crossover Study.Anesthesiology · 2023Article
- Common Pregnancy Complaints Can Lead to Motor Vehicle Collisions or Near-Miss Incidents.Healthcare (Basel, Switzerland) · 2022Article
- Factors Influencing Pregnant Women's Injuries and Fetal Loss Due to Motor Vehicle Collisions: A National Crash Data-Based Study.Healthcare (Basel, Switzerland) · 2021Article
- Article
- Direct medical costs of motorcycle crashes in Ontario.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 2017Article
- Life-threatening motor vehicle crashes in bright sunlight.Medicine · 2017Article
- Traffic Crash Risks in Morbidly Obese Drivers Before and After Weight Loss Surgery.Obesity surgery · 2016Article
- Article
- Pregnancy and risk of a traffic crash.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 2014Article
- Pregnancy and risk of a traffic crash.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 2014Article
- High risk of traffic crashes in pregnancy: are there any explanations?CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 2014Article
Corrections and comments
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Authors and funding
4 authors.
Funding
Abstract
introductionPregnancy causes diverse physiologic and lifestyle changes that may contribute to increased driving and driving error. We compared the risk of a serious motor vehicle crash during the second trimester to the baseline risk before pregnancy.
methodsWe conducted a population-based self-matched longitudinal cohort analysis of women who gave birth in Ontario between April 1, 2006, and March 31, 2011. We excluded women less than age 18 years, those living outside Ontario, those who lacked a valid health card identifier under universal insurance, and those under the care of a midwife. The primary outcome was a motor vehicle crash resulting in a visit to an emergency department.
resultsA total of 507,262 women gave birth during the study period. These women accounted for 6922 motor vehicle crashes as drivers during the 3-year baseline interval (177 per mo) and 757 motor vehicle crashes as drivers during the second trimester (252 per mo), equivalent to a 42% relative increase (95% confidence interval 32%-53%; p<0.001). The increased risk extended to diverse populations, varied obstetrical cases and different crash characteristics. The increased risk was largest in the early second trimester and compensated for by the third trimester. No similar increase was observed in crashes as passengers or pedestrians, cases of intentional injury or inadvertent falls, or self-reported risky behaviours.
interpretationPregnancy is associated with a substantial risk of a serious motor vehicle crash during the second trimester. This risk merits attention for prenatal care.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.